May I suggest that you read some about magnets? Check here first

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Have fun, Tom

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Tom Biasi
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The OP question is deficient. But...

If "Joyjoy" is interested in obtaining the frequency of a spinning magnet, or if he wants to detect the presence or absence of a moving magnet, he could use a reed switch or a hall effect sensor. Both of them would detect the presence or absence of a magnet.


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Is there a device i can use to measure the frequency of a magnet?

thank you

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